Skip to content
Toolocate
Submit your tool
Toolocate
Submit

Suggest an edit

Tell us what's wrong or missing. We check every suggestion against the tool's website.

If you can, include a link to where the tool's website says it.

Only if you'd like a reply.

GPTZero

Visit website

Check text for AI-generated content and review the writing process.

FreemiumAI Content DetectorsAI Plagiarism Checkers

Verified Nov 3, 2026

Are you the maker of GPTZero?Claim toolAdvertise
GPTZero website screenshot

What is GPTZero?

GPTZero checks writing for signs of AI-generated content, including documents that mix human and AI text. Users can paste text, upload files, or import documents from Google Drive to receive an estimated AI percentage and sentence-level highlights. It supports English, German, Portuguese, French, and Spanish, with tools for educators, students, publishers, and other people reviewing written work.

Beyond detection, GPTZero offers plagiarism checking, grammar checks, and AI-powered writing feedback. Its Google Docs writing replay lets reviewers watch how a document developed, including pasted text and typing patterns. A Chrome extension brings detection into browser workflows, while integrations with Canvas and Google Classroom support classroom use. Developers can also add detection to other software through its API.

The free plan includes a monthly scanning allowance, while paid plans increase word limits and add capabilities such as downloadable reports and batch uploads. Detection results are estimates rather than proof of authorship: longer documents generally produce stronger results than short passages, and results should not be used alone to punish a writer or reach a final judgment.

What can GPTZero do?

  • AI content detection

    Estimate how much text may be AI-generated and highlight individual sentences, including in mixed human-and-AI documents.

  • Writing replay

    Review a Google Docs document's writing process, including pasted text and typing patterns.

  • Plagiarism checking

    Check writing for material copied from outside sources without attribution.

  • Writing feedback

    Get AI-powered writing feedback and grammar checks to help revise written work.

  • Batch document scanning

    Upload multiple files for review, with support for up to 250 files at once on Professional.

  • Integrations and API

    Use detection through a Chrome extension, classroom integrations, or an API for custom applications.

Who is GPTZero for?

Educators
Review student writing and use detection results and writing history to guide academic integrity discussions.
Students
Review writing, get feedback, and share records of the writing process.
Publishers and writers
Check submissions for AI-generated content and plagiarism, and document authorship.
Recruiters
Check written materials for signs of AI-generated content.

How much is GPTZero?

Official pricing

  • FREE

    Free

  • PREMIUM

    $155.88/yr

  • PROFESSIONAL

    $299.88/yr

  • Professional Team Plan

    $45.99/mo

Free plan: Includes 10,000 words per month, basic AI scanning, one free Advanced Scan, and five free AI Highlights in the Chrome extension.

Frequently asked questions

Can I use GPTZero for free?

The free plan includes 10,000 words per month, basic AI scanning, one free Advanced Scan, and five free AI Highlights in the Chrome extension.

How much do paid plans cost?

Premium costs $155.88 per year, equivalent to $12.99 per month billed yearly, and includes 300,000 words per month. Professional costs $299.88 per year, equivalent to $24.99 per month billed yearly, and includes 500,000 words per month.

Which languages does GPTZero support?

GPTZero fully supports English, German, Portuguese, French, and Spanish. Detection is strongest on English prose.

Can detection results prove someone used AI?

No AI detector is completely accurate. Results should not be used as the sole basis for punishment or a final judgment, and longer documents generally produce stronger results than short passages.

Does GPTZero offer a team plan?

The Professional Team Plan includes shared credits, centralized billing, seat management, and 500,000 words per member each month. It requires at least two seats and costs $299.88 per seat per year, equivalent to $24.99 per month billed yearly.

Can developers integrate GPTZero into their software?

GPTZero offers an AI detection API, with ready-to-use code examples in 17 programming languages.

GPTZero alternatives

Compare alternatives
  1. 1AI DetectorCheck text for AI-generated writing with sentence-level scores and multiple detectors.
  2. 2TurnitinCheck writing for AI use and text similarity, and support secure academic assessment.
  3. 3ZeroGPTCheck text for AI-generated content and plagiarism, with tools for editing and rewriting.
  4. 4Undetectable AIDetect AI-generated content and rewrite text for a more natural writing style.
  5. 5GPTinfWriting toolkit that humanizes AI text and checks drafts for AI signals and plagiarism.

More AI Content Detectors

See more

  • Scribbr

    AI Writing Assistants

    Academic writing tools for proofreading, AI detection, paraphrasing, and citations.

    Freemium

  • Sightengine

    AI Content Detectors

    APIs for content moderation, AI-generated media detection, and image analysis.

    Freemium

  • JustDone

    AI Writing Assistants

    AI tools for drafting, rewriting, checking originality, and studying.

    Paid

  • MyDetector

    AI Content Detectors

    Check text for signs of AI writing with scores and sentence-level analysis.

    Freemium

  • GradPilot

    AI Writing Assistants

    Get rubric-based admissions essay feedback, scores and AI-writing detection.

    Freemium